Buggy code:
private boolean singleton = true ; private boolean prototype = false ; private boolean abstractFlag = false ; private boolean lazyInit = false ; private int autowireMode = AbstractBeanDefinition . AUTOWIRE_NO ; private int dependencyCheck = AbstractBeanDefinition . DEPENDENCY_CHECK_NONE ; private String [ ] dependsOn ; private boolean autowireCandidate = true ; private final Map qualifiers = new LinkedHashMap ( ) ; private boolean primary = false ; private ConstructorArgumentValues constructorArgumentValues ; private MutablePropertyValues propertyValues ; private MethodOverrides methodOverrides = new MethodOverrides ( ) ; private String factoryBeanName ; private String factoryMethodName ; private String initMethodName ; private String destroyMethodName ; private boolean enforceInitMethod = true ; private boolean enforceDestroyMethod = true ; private boolean synthetic = false ; private int role = BeanDefinition . ROLE_APPLICATION ; private String description ; private Resource resource ; protected AbstractBeanDefinition ( ) { } protected AbstractBeanDefinition ( ConstructorArgumentValues cargs , MutablePropertyValues pvs ) { } @ Deprecated protected AbstractBeanDefinition ( AbstractBeanDefinition original ) { } protected AbstractBeanDefinition ( BeanDefinition original ) { } @ Deprecated public void overrideFrom ( AbstractBeanDefinition other ) { } public void overrideFrom ( BeanDefinition other ) { } public void applyDefaults ( BeanDefinitionDefaults defaults ) { } public boolean hasBeanClass ( ) { } public void setBeanClass ( Class beanClass ) { } public Class getBeanClass ( ) throws IllegalStateException { } public void setBeanClassName ( String beanClassName ) { } public String getBeanClassName ( ) { } public Class resolveBeanClass ( ClassLoader classLoader ) throws ClassNotFoundException { } public void setScope ( String scope ) { } public String getScope ( ) { } @ Deprecated public void setSingleton ( boolean singleton ) { } public boolean isSingleton ( ) { } public boolean isPrototype ( ) { } public void setAbstract ( boolean abstractFlag ) { } public boolean isAbstract ( ) { } public void setLazyInit ( boolean lazyInit ) { } public boolean isLazyInit ( ) { } public void setAutowireMode ( int autowireMode ) { } public int getAutowireMode ( ) { } public int getResolvedAutowireMode ( ) { } public void setDependencyCheck ( int dependencyCheck ) { } public int getDependencyCheck ( ) { } public void setDependsOn ( String [ ] dependsOn ) { } public String [ ] getDependsOn ( ) { } public void setAutowireCandidate ( boolean autowireCandidate ) { } public boolean isAutowireCandidate ( ) { } public void addQualifier ( AutowireCandidateQualifier qualifier ) { } public boolean hasQualifier ( String typeName ) { } public AutowireCandidateQualifier getQualifier ( String typeName ) { } public Set getQualifiers ( ) { } protected void copyQualifiersFrom ( AbstractBeanDefinition source ) { } public void setPrimary ( boolean primary ) { } public boolean isPrimary ( ) { } public void setConstructorArgumentValues ( ConstructorArgumentValues constructorArgumentValues ) { } public ConstructorArgumentValues getConstructorArgumentValues ( ) { } public boolean hasConstructorArgumentValues ( ) { } public void setPropertyValues ( MutablePropertyValues propertyValues ) { } public MutablePropertyValues getPropertyValues ( ) { } public void setMethodOverrides ( MethodOverrides methodOverrides ) { } public MethodOverrides getMethodOverrides ( ) { } public void setFactoryBeanName ( String factoryBeanName ) { } public String getFactoryBeanName ( ) { } public void setFactoryMethodName ( String factoryMethodName ) { } public String getFactoryMethodName ( ) { } public void setInitMethodName ( String initMethodName ) { } public String getInitMethodName ( ) { } public void setEnforceInitMethod ( boolean enforceInitMethod ) { } public boolean isEnforceInitMethod ( ) { } public void setDestroyMethodName ( String destroyMethodName ) { } public String getDestroyMethodName ( ) { } public void setEnforceDestroyMethod ( boolean enforceDestroyMethod ) { } public boolean isEnforceDestroyMethod ( ) { } public void setSynthetic ( boolean synthetic ) { } public boolean isSynthetic ( ) { } public void setRole ( int role ) { } public int getRole ( ) { } public void setDescription ( String description ) { } public String getDescription ( ) { } public void setResource ( Resource resource ) { } public Resource getResource ( ) { } public void setResourceDescription ( String resourceDescription ) { } public String getResourceDescription ( ) { } public void setOriginatingBeanDefinition ( BeanDefinition originatingBd ) { } public BeanDefinition getOriginatingBeanDefinition ( ) { } public void validate ( ) throws BeanDefinitionValidationException { } public void prepareMethodOverrides ( ) throws BeanDefinitionValidationException { } protected void prepareMethodOverride ( MethodOverride mo ) throws BeanDefinitionValidationException { } @ Override public Object clone ( ) { } public abstract AbstractBeanDefinition cloneBeanDefinition ( ) { } @ Override public boolean equals ( Object other ) { } @ Override public int hashCode ( ) { } @ Override public String toString ( ) { <START_BUG> StringBuffer sb = new StringBuffer ( "class<seq2seq4repair_space>[" ) ; <END_BUG> sb . append ( getBeanClassName ( ) ) . append ( "]" ) ; sb . append ( ";<seq2seq4repair_space>scope=" ) . append ( this . scope ) ; sb . append ( ";<seq2seq4repair_space>abstract=" ) . append ( this . abstractFlag ) ; sb . append ( ";<seq2seq4repair_space>lazyInit=" ) . append ( this . lazyInit ) ; sb . append ( ";<seq2seq4repair_space>autowireMode=" ) . append ( this . autowireMode ) ; sb . append ( ";<seq2seq4repair_space>dependencyCheck=" ) . append ( this . dependencyCheck ) ; sb . append ( ";<seq2seq4repair_space>autowireCandidate=" ) . append ( this . autowireCandidate ) ; sb . append ( ";<seq2seq4repair_space>primary=" ) . append ( this . primary ) ; sb . append ( ";<seq2seq4repair_space>factoryBeanName=" ) . append ( this . factoryBeanName ) ; sb . append ( ";<seq2seq4repair_space>factoryMethodName=" ) . append ( this . factoryMethodName ) ; sb . append ( ";<seq2seq4repair_space>initMethodName=" ) . append ( this . initMethodName ) ; sb . append ( ";<seq2seq4repair_space>destroyMethodName=" ) . append ( this . destroyMethodName ) ; if ( ( this . resource ) != null ) { sb . append ( ";<seq2seq4repair_space>defined<seq2seq4repair_space>in<seq2seq4repair_space>" ) . append ( this . resource . getDescription ( ) ) ; } return sb . toString ( ) ; } }

Fix:
StringBuilder sb = new StringBuilder ( "class<seq2seq4repair_space>[" ) ;